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Finding the Fourth Proportional to 156.17, 234.33 and 64.90

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Solution

The fourth proportional to 156.17, 234.33 and 64.90 is: 97.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    156.17 : 234.33 = 64.90 : x
  2. Step 2: Convert to fraction form
    156.17/234.33 = 64.90/x
  3. Step 3: Cross multiply
    156.17x = 234.33 × 64.90
  4. Step 4: Simplify right side
    156.17x = 15,208.02
  5. Step 5: Solve for x
    x = 15,208.02/156.17
  6. Step 6: Final answer
    x = 97.38

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.